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Welcome

Executors and Images

An executor defines the underlying technology or environment in which to run a job. Set up your jobs to run in the docker, machine, macos or windows executor and specify an image with the tools and packages you need.

Executor Overview

Docker

jobs:
  build: # name of your job
    docker: # executor type
      - image: buildpack-deps:trusty # primary container will run Ubuntu Trusty

      steps:
        # Commands run in the primary container

Find out more about using the docker executor here.

Machine

jobs:
  build: # name of your job
    machine: # executor type
      image: ubuntu-1604:201903-01 # # recommended linux image - includes Ubuntu 16.04, docker 18.09.3, docker-compose 1.23.1

      steps:
        # Commands run in a Linux virtual machine environment

jobs:
  build: # name of your job
    machine: true # executor type

      steps:
        # Commands run in a Linux virtual machine environment

Find out more about using the machine executor here.

macOS

Available on CircleCI.com - not currently available on self-hosted installations of CircleCI Server.

jobs:
  build: # name of your job
    macos: # executor type
      xcode: 11.3.0

    steps:
      # Commands run in a macOS virtual machine environment
      # with Xcode 11.3 installed

Find out more about using the macos executor here.

Windows

The syntax for using the Windows executor in your config differs depending on whether you are using:

  • The cloud version of CircleCI, using config version 2.1 and the Windows orb. You also need to enable Pipelines
  • Self-hosted installation of CircleCI Server with config version 2.0 – this option is an instance of using the machine executor with a Windows image – Introduced in CircleCI Server v2.18.3.
version: 2.1 # Use version 2.1 to enable orb usage.

orbs:
  win: circleci/windows@2.2.0 # The Windows orb give you everything you need to start using the Windows executor.

jobs:
  build: # name of your job
    executor: win/default # executor type

    steps:
      # Commands are run in a Windows virtual machine environment
      - checkout
      - run: Write-Host 'Hello, Windows'

version: 2

jobs:
  build: # name of your job
    machine:
      image: windows-default # Windows machine image
    resource_class: windows.medium
    steps:
      # Commands are run in a Windows virtual machine environment
      - checkout
      - run: Write-Host 'Hello, Windows'

Find out more about using the windows executor here. See the Windows orb details for the list of options available in the Windows orb.

See Also